Prices Fall for Some OPEC Members as U.S. Oil Booms

Oil Price for Some African Members Suffers

LONDON—The price of benchmark oil from some members of the Organization of the Petroleum Exporting Countries has fallen in the past year, the group said in its annual report Friday, highlighting the prospect of a deepening rift between producing countries that are most affected and those that remain largely unscathed.

The unexpected energy boom in the U.S. is causing a revolution in global oil trade as America's appetite for...